Humans converse using speech and other gestures that may include facial expressions, usually called body language, thereby making human conversations complex [1]}.
Similar gestures may be employed when writing conversations.
Such gestures may be clarification questions or the mimicking of sound (onomatopoeia).
In human conversations, one speaker may have the conversational initiative, i.e., the speaker directs the conversation.
This is typical in an interview where the interviewer asking the questions directs the conversation.
It is the style for qa conversational ai.
In typical human-human conversations, the initiative shifts to and from different speakers.
This kind of mixed (or rotating) initiative is harder to achieve in conversational systems [1]}.
Besides conversation initiative, below are additional characteristics of human conversations, according to sacks1978simplest.
